iCoupler Digital Isolators

iCoupler® Digital Isolators – An Alternative to Optocouplers

Analog Devices, Inc. digital isolators with iCoupler® technology enable designers to implement isolation in designs without the cost, size, power, performance, and reliability constraints found with optocouplers. iCoupler digital isolators also meet the wide range of creepage/clearance requirements and are the industry’s only digital isolators with certified 8 mm creepage. With more than half a billion channels shipped into the field, these magnetically isolated products meet the same rigid safety standards as optocouplers.

Wide Range of Applications

  • Medical Devices
  • Power Supplies
  • Instrumentation Devices
  • Networking Equipment
  • Metering
  • Lighting and Building Controls
  • Motor Drives
  • Solar/Wind Energy
  • Communications
  • Industrial Field Bus
  • Automotive
  • Industrial Process Controls

Utilizing ADI's proven iCoupler® digital isolator technology, the isolated gate driver portfolio offers designers performance, safety and reliability advantages over solutions using optocouplers or high voltage gate drivers while saving valuable board space. Learn more here.


Advantages Over Optocouplers

iCoupler® Technology: An Alternative to Optocouplers

Anatomy of a Digital Isolator

Why use digital isolators? iCoupler digital isolators achieve many advantages over optocouplers. For example:


  • 4x improvement in data rate and timing specifications


  • Multiple isolation channels integrated with other functions reduce size, cost and design complexity.

Power Consumption

  • Operates at power levels up to 90% lower than optocouplers.

Ease of Use

  • Standard digital CMOS interfaces mean no external components needed to connect to other digital devices.


  • Eliminates LED wearout traditionally found in optocouplers.


  • Meets same rigid safety standards as optocouplers, including reinforced insulation.

Featured Portfolio: ADI Introduces First Family of Integrated, Isolated Linear Error Amplifiers

The ADuM3190 and ADuM4190 are isolated linear error amplifiers ideal for linear feedback power supplies with primary side controllers enabling improvements in transient response, power density and stability as compared to commonly used optocoupler and shunt regulator solutions.

Unlike optocoupler-based solutions, which have an uncertain current-transfer-ratio over lifetime and at high temperatures, the ADuM3190 transfer function does not change over lifetime and is stable over a wide temperature range of -40°C to 125°C.

This single package solution also reduces component count, design time and design costs.

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Newly Released Released Isolated Error Amplifer Products - Sample and Evaluate Now!

  • ADuM3190: 2.5kV rms isolated error amplifier
  • ADuM4190: 5kV rms isolated error amplifier
  • EVAL-ADuM3190EBZ: Evaluation board for the ADuM3190 and ADuM4190 products

View iCoupler Products

Sample and Evaluate

iCoupler digital isolators offer the broadest range of portfolio offerings. Sample and evaluate these parts through Digi-Key now!

Portfolio Offerings - Samples


Portfolio Offerings - Evaluation Boards

  • EVAL-ADUM3070: Supports the ADuM3070 isolated switching regulator
  • EVAL-ADUM3221A: Supports the ADuM3220/3221 isolated 4A gate drivers
  • EVAL-ADUM3223A: Supports the ADuM3223 3kV rms isolated half-bridge gate driver
  • EVAL-ADUM3471: Supports the ADuM347x family of isolated switching regulators
  • EVAL-ADUM4160: Supports the ADuM3160/4160 USB isolators
  • EVAL-ADUM4223A: Supports the ADuM4223 5kV rms isolated half-bridge gate driver
  • EVAL-ADUMQS: Universal board for most 16-lead wide body SOIC and QSOP packages
  • ezLINX™: Supports most digitally-isolated communication standards
  • EVAL-ADM2587E: Supports ADM2587E 2.5kV rms signal and power isolated RS-485 transceiver
  • EVAL-ADM3053: Supports ADM3053 signal and power isolated CAN transceiver with integrated DC/DC converter
  • EVAL-ADM3252E: Supports ADM3252E isolated, dual-channel RS-232 line driver/receiver